Charging control method for electric moving body, and electric moving body

Abstract

A battery consumption amount from when an electric vehicle departs a base charging location to when the electric moving body has returned to the base charging location is set as a consumption amount of one day, and an estimated consumption amount of one day is calculated based on the consumption amounts of the past n days. A value obtained by adding the estimated consumption amount and a margin to a lower limit remaining capacity determined in advance by a user is set as a charging recommendation threshold value. When the remaining capacity of the battery drops below the charging recommendation threshold value, a notification prompting charging of the battery is transmitted to an on-board HMI of the electric moving body or a terminal of the user.

What is claimed is: 
     
       1. A charging control method for an electric moving body that moves using a battery as a power source, the charging control method comprising:
 setting, as a consumption amount of one day, a battery consumption amount from when the electric moving body departs a base charging location to when the electric moving body has returned to the base charging location, and calculating an estimated consumption amount of one day based on the consumption amounts of past n days; 
 setting, as a charging recommendation threshold value, a value obtained by adding the estimated consumption amount and a margin to a lower limit remaining capacity determined in advance; 
 transmitting a notification prompting charging of the battery to an on-board human machine interface of the electric moving body or a terminal of a user when a remaining capacity of the battery drops below the charging recommendation threshold value; 
 acquiring user feedback regarding whether the user has a worry about an electricity shortage of the battery through the on-board human machine interface or the terminal of the user; and 
 changing the lower limit remaining capacity to be higher in a case where the user feedback indicates that the user has the worry and keeping the lower limit remaining capacity unchanged in a case where the user feedback indicates that the user does not have the worry. 
 
     
     
       2. The charging control method for the electric moving body according to  claim 1 , wherein:
 the estimated consumption amount is set as a median of the consumption amounts of the past n days; and 
 a value obtained by adding the margin to the estimated consumption amount is set as a product of the median and m (m is an integer greater than or equal to 1), when a day on which the notification is desired to be received is m days in advance. 
 
     
     
       3. The charging control method for the electric moving body according to  claim 1 , wherein:
 the estimated consumption amount is set as a median of the consumption amounts of the past n days; and 
 a value obtained by adding the estimated consumption amount and the margin is set as a maximum value of the consumption amounts of the past n days excluding outliers, or as a setting value between the maximum value and a third quartile. 
 
     
     
       4. A charging control method for an electric moving body that moves using a battery as a power source, the charging control method comprising:
 setting, as a consumption amount of one day, a battery consumption amount from when the electric moving body departs a base charging location to when the electric moving body has returned to the base charging location, and calculating an estimated consumption amount of one day based on the consumption amounts of past n days; 
 setting, as a charging recommendation threshold value, a value obtained by adding the estimated consumption amount and a margin to a lower limit remaining capacity determined in advance; and 
 transmitting a notification prompting charging of the battery to an on-board human machine interface of the electric moving body or a terminal of a user when a remaining capacity of the battery drops below the charging recommendation threshold value wherein: 
 a first charging recommendation threshold value and a second charging recommendation threshold value are set; 
 the first charging recommendation threshold value is set as a value obtained by adding, to the lower limit remaining capacity, a maximum value of the consumption amounts of the past n days excluding outliers, or a setting value between the maximum value and a third quartile; 
 the second charging recommendation threshold value is set as a value obtained by adding, to the lower limit remaining capacity, a product of a median of the consumption amounts of the past n days and m (m is an integer greater than or equal to 1), when a day on which the notification is desired to be received is m days in advance; and 
 when the remaining capacity of the battery drops below the first charging recommendation threshold value, the notification is provided from when the electric moving body returns on a day on which charging is scheduled, and when the remaining capacity of the battery drops below the second charging recommendation threshold value, the notification is provided from when the electric moving body returns on the day m days in advance. 
 
     
     
       5. The charging control method for the electric moving body according to  claim 1 , wherein
 a probability at which the consumption amount of a following day becomes less than or equal to a given consumption amount is calculated from a probability distribution of the consumption amounts of the past n days, and the estimated consumption amount is set to a consumption amount causing the probability to become greater than or equal to a prescribed probability. 
 
     
     
       6. The charging control method for the electric moving body according to  claim 1 , wherein
 a distribution of the consumption amounts of the past n days is created, and then a consumption amount having a highest probability density of the consumption amount of one day according to a kernel density estimation is set as the estimated consumption amount. 
 
     
     
       7. The charging control method for the electric moving body according to  claim 1 , wherein
 a scheduled consumption amount from when the electric moving body returns to the base charging location to when the electric moving body departs on a following day is added to the estimated consumption amount. 
 
     
     
       8. The charging control method for the electric moving body according to  claim 1 , wherein
 when charging up to a target remaining capacity at a time of departure, if a value obtained by adding a chargeable amount from a time of return to a time of departure to the charging recommendation threshold value is predicted to drop below the target remaining capacity, the charging recommendation threshold value is adjusted to be higher to enable charging up to the target remaining capacity with the chargeable amount. 
 
     
     
       9. An electric moving body that moves using a battery as a power source and comprises a charging control apparatus including a memory that stores instructions, and a CPU that reads and executes the instructions from the memory, wherein
 the CPU executes the instructions to cause the charging control apparatus to: 
 set, as a consumption amount of one day, a battery consumption amount from when the electric moving body departs a base charging location to when the electric moving body has returned to the base charging location, and calculate an estimated consumption amount of one day based on the consumption amounts of past n days; 
 set, as a charging recommendation threshold value, a value obtained by adding the estimated consumption amount and a margin to a lower limit remaining capacity determined in advance; 
 transmit a notification prompting charging of the battery to an on-board human machine interface of the electric moving body or a terminal of a user when a remaining capacity of the battery drops below the charging recommendation threshold value; 
 acquire user feedback regarding whether the user has a worry about an electricity shortage of the battery through the on-board human machine interface or the terminal of the user; and 
 change the lower limit remaining capacity to be higher in a case where the user feedback indicates that the user has the worry and keep the lower limit remaining capacity unchanged in a case where the user feedback indicates that the user does not have the worry.